Access per-device, per-developer data that your associated server can use in its business logic.
- iOS 11.0+Beta
- tvOS 11.0+Beta
Using the DeviceCheck APIs, in combination with server-to-server APIs, you can set and query two bits of data per device, while maintaining user privacy. You might use this data to identify devices that have already taken advantage of a promotional offer that you provide, or to flag a device that you have determined to be fraudulent.
Your app uses the DeviceCheck APIs to generate an ephemeral token that identifies a device. Your associated server combines this token with an authentication key that you receive from Apple and uses the result to request access to the per-device bits. After successful authentication, Apple passes the current values of the bits, along with the date they were last modified, to your server. Your server applies its business logic to this information and communicates the results to your app as appropriate.